The document discusses liability for joint promisors under a contract. It states that (1) when two or more people make a joint promise, the promisee can compel any one of the joint promisors to perform the whole promise. (2) If one promisor performs, they can enforce contribution from the other joint promisors unless the contract says otherwise. (3) Each joint promisor may compel the others to equally contribute to performing the promise, unless the contract indicates a different intention.